Stress and Strain Characteristics of Foam Lightweight Soil Composited with Fly Ash and Fine Sand
In order to investigate the stress and strain characteristics of fine sand and fly ash composite foam lightweight soil(FLS),this study used cement,fly ash,water,fine sand and foam as raw materials to prepare the sample,and conducted unconfined compressive strength tests.The test results showed that the stress and strain curves of FLS were softening type,and with the increase of axial strain,its axial stress increases to the peak value and then decreases gradually.The 28-day compressive strength of FLS was 0.84 MPa when its wet density,water-binder ratio and fine sand content were 600 kg/m3,0.60 and 20％,respectively.The compressive strength of FLS was negatively linearly correlated with the fine sand content.The proposed composite sinusoidal-exponential model can better characterize the stress and strain characteristics of FLS,providing guidance for engineering design and theoretical analysis.
fine sandfly ashfoam lightweight soilstress and strain characteristiccomposite sinusoidal-exponentialunconfined compressive strength test
万方数据
维普
